Chang Duan

Title: Innovations of Chang Duan in Video Bit Rate Control

Introduction

Chang Duan is an accomplished inventor based in Chengdu, China. He has made significant contributions to the field of video technology, particularly in optimizing bit rate control for panoramic video. His innovative approach addresses the challenges of temporal distortion propagation, enhancing the quality and efficiency of video coding.

Latest Patents

Chang Duan holds a patent for a "Zero-delay panoramic video bit rate control method considering temporal distortion propagation." This method aims to optimize target bit allocation and achieve global rate-distortion optimization in coding. It encompasses coding tree unit (CTU)-level bit rate control and temporal global rate-distortion optimization. The CTU-level bit rate control involves optimizing target bit allocation and updating bit rate control parameters. Furthermore, the temporal global rate-distortion optimization utilizes reconstruction error and motion compensation prediction error information from previously coded frames to estimate the temporal dependence between CTUs in the current coding frame and those in the previous coded frame. This allows for the adjustment of coding parameters for the current CTU. The coding parameters are further fine-tuned based on the area stretching ratio encountered during the projection of panoramic video from a 3D spherical surface to a 2D plane, considering the detrimental impact of interpolated redundant pixels on the coding process.

Career Highlights

Chang Duan is affiliated with the University of Electronic Science and Technology of China, where he continues to advance his research in video technology. His work has garnered attention for its innovative solutions to complex problems in video coding.

Collaborations

Chang has collaborated with notable colleagues, including Lei Luo and Jingjing Hou, contributing to the advancement of their shared research interests.

Conclusion

Chang Duan's innovative work in video bit rate control exemplifies the potential for technological advancements in the field of video coding. His contributions are paving the way for improved video quality and efficiency in various applications.